• Expressed as dose delivered per individual neutron • Units are those of dose per neutron/cm2 (Gy cm2 )
N = atom density (cm-3)
σS = scattering cross section (for each element)
Qave = average energy transferred in collision (½Emax)
ρ = tissue density
57. Сalculation of heavy ions protection. A track structure model for the calculation of inactivation probabilities of heavy ions has been developed, which is based on measurable quantities only. The model describes the following inactivation properties of heavy ion radiation: (1) the transition from shouldered to exponential survival curves, depending on the atomic number, energy and LET of the particle; (2) the LET dependence of inactivation cross sections s, including the supralinear increase for low LET particles, the plateau region between 200 and 1000 keV.µm-1 and the s LET hooks for higher LET values; (3) differences in the shape of the s LET hooks for different biological objects; (4) the shift of RBE maxima from 30 to 300 keV.µm-1 with increasing atomic number; (5) the exchanged efficiency of heavy ions in the case of mixed radiation fields (X rays combined with heavy ion irradiation).
вопросы
The basic definition of interaction of ionizing radiation with matter
The biology influence of ionization radiation
Radiation sickness
The radioactivity law
The activity of radionuclides
The unit of measurement
Protons, alpha particles and heavy ions
Ionization loses
Elastic and inelastic scattering of heavy charge particle
Multiple scattering of the recoil of heavy charge particle
Nuclear reactions
Ionizing losses, Radiation losses of electrons
Elastic scattering of electron
Characteristic X-ray radiation
The law of gamma radiation
Interaction of gamma rays with matter
Photoelectric absorption
Thomson scattering
Compton effect
The creation of electron-positron pair
The total coefficient of gamma radiation attenuation
Classification of neutrons
Elastic scattering of neutrons
Recoil nuclei
The radioactive capture
Nuclear reaction with neutron
Classification of particles and antiparticles
Annihilation
Units of radiation dose
Equivalent dose
Ionizing method
Scintillating method
Photographic method
Calorimetric method
Chemical method
The method of neutron registration
Calculation of neutron dose
Dosimetric controlling npp
Calculation of gamma rays protection
Calculation alpha radiation protection
Calculations of beta radiation protection
Сalculation of heavy ions protection
Calculation of neutron radiation protection
The cross section of neutrons, protons
Fundamental forces